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        <div class="hero-textblock">Seamlessly interoperate cross-table between Apache Hudi, Delta Lake, and Apache Iceberg</div>
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          <a href="https://github.com/apache/incubator-xtable" class="primary-button w-button">Try it on GitHub</a>
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      Apache XTable™ is incubating in the Apache Software Foundation and was recently renamed from OneTable
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      <h1 class="heading-2">Omni-Directional Interoperability</h1>
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        <h1 class="heading-section why">What is<span class="text-span"><br /> Apache XTable™?</span></h1>
        <ul role="list" class="list">
          <li class="list-item why">Apache XTable™ provides cross-table omni-directional interop between lakehouse table formats</li>
          <li class="list-item why">Apache XTable™ is NOT a new or separate format, Apache XTable™ provides abstractions and tools for the translation of lakehouse table format metadata</li>
          <li class="list-item why">Apache XTable™ is formerly known as OneTable</li>
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        <div id="w-node-b5fb012b-3ce1-44e6-09e8-015167aa0190-e51fabf1" class="w-layout-cell what-cell"><img src="images/source-2.png" loading="lazy" alt="" class="image-6">
          <div class="what-text">Choose your <span class="text-span-3">source</span> format</div>
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        <div id="w-node-_78ea2b2b-1c5a-5f05-38c6-1aec2d36f7f9-e51fabf1" class="w-layout-cell what-cell"><img src="images/destination-1.png" loading="lazy" alt="" class="image-5">
          <div class="what-text">Choose your <span class="text-span-3">destination</span> format(s)</div>
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        <div id="w-node-a5b4b7dd-251e-d9a7-855d-46427e19ad9b-e51fabf1" class="w-layout-cell what-cell"><img src="images/metadata-1.png" loading="lazy" alt="" class="image-4">
          <div class="what-text">Apache XTable™ will translate the <span class="text-span-3">Metadata</span> layers</div>
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        <h1 class="heading-section">Why <span class="text-span">build</span><br /> Apache XTable™?</h1>
        <ul role="list" class="list">
          <li class="list-item">Choosing a table format is a costly evaluation</li>
          <li class="list-item">Each project has rich features that may fit different use-cases</li>
          <li class="list-item">Some vendors use a table format as a point of lock-in</li>
          <li class="list-item">Your data should be <span class="text-span-2">UNIVERSAL</span></li>
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          <h1 class="heading-section-together">Let&#x27;s <span class="text-span">build together</span></h1>
          <div class="text-block">Apache XTable™ is a community driven open source project. Come join us on Github and find easy ways to contribute.</div>
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        <a href="https://github.com/apache/incubator-xtable" class="primary-button w-button">Try it on GitHub</a>
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        <h2>FAQs<br></h2>
        <div class="text-block-copy">Got questions? We&#x27;ve got answers.</div>
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            <h4 class="accordion-heading"><span><strong class="faq-q">How does it work?</strong></span></h4>
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            <p class="faq-a">Apache XTable™ reads the existing metadata of your table and writes out metadata for one or more other table formats by leveraging the existing APIs provided by each table format project. The metadata will be persisted under a directory in the base path of your table (_delta_log for Delta, metadata for Iceberg, and .hoodie for Hudi). This allows your existing data to be read as though it was written using Delta, Hudi, or Iceberg. For example, a Spark reader can use spark.read.format(“delta | hudi | iceberg&gt;”).load(“path/to/data”). </p>
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            <h4 class="accordion-heading"><span><strong class="faq-q">How is Apache XTable™ different from Delta Lake Uniform?</strong></span></h4>
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            <p class="faq-a">Apache XTable™ provides abstraction interfaces that allow omni-directional interoperability across Delta, Hudi, Iceberg, and any other future lakehouse table formats such as Apache Paimon. Apache XTable™ is a standalone github project that provides a neutral space for all the lakehouse table formats to constructively collaborate together.<br><br>Delta Lake Uniform is a one-directional conversion from Delta Lake to Apache Hudi or Apache Iceberg. Uniform is also governed inside the Delta Lake repo.</p>
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          <div id="q1" class="accordion-item-trigger">
            <h4 class="accordion-heading"><span><strong class="faq-q">When should I consider Apache XTable™?</strong></span></h4>
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            <p class="faq-a">Apache XTable™ can be used to easily switch between any of the table formats or even benefit from more than one simultaneously. Some organizations use Apache XTable™ today because they have a diverse ecosystem of tools with polarized vendor support of table formats. Some users want lightning fast ingestion or indexing from Hudi and photon query accelerations of Delta Lake inside of Databricks. Some users want managed table services from Hudi, but also want write operations from Trino to Iceberg. Regardless of which combination of formats you need, Apache XTable™ ensures you can benefit from all 3 projects.</p>
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            <h4 class="accordion-heading"><span><strong class="faq-q">Does Apache XTable™ work in every cloud?</strong></span></h4>
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            <p class="faq-a">Yes, anywhere that Delta, Iceberg, or Hudi work, Apache XTable™ works.</p>
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          <div id="q1" class="accordion-item-trigger">
            <h4 class="accordion-heading"><span><strong class="faq-q">What are the current limitations?</strong></span></h4>
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            <p class="faq-a">1. Hudi and Iceberg MoR tables not supported<br>2. Delta Delete Vectors are not supported<br>3. Synchronized transaction timestamps<br><br>With Apache XTable™ you pick one primary format and one or more secondary formats. The write operations with the primary format work as normal. Apache XTable™ than translates the metadata from the primary format to the secondaries. When committing the metadata of the secondary formats, the timestamp of the commit will not be the exact same timestamp as shown in the primary.<br></p>
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          <div id="q1" class="accordion-item-trigger">
            <h4 class="accordion-heading"><span><strong class="faq-q">How can I contribute?</strong></span></h4>
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            <p class="faq-a">Come check out the project on Github and add a little star. There are some low hanging fruit features, bugs, and documentation that can be added. Reach out directly to any of the contributors on Github to ask for help.</p>
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          <div id="q1" class="accordion-item-trigger">
            <h4 class="accordion-heading"><span><strong class="faq-q">How can I learn more?</strong></span></h4>
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            <p class="faq-a">Follow Apache XTable™ (Incubating) community channels on Linkedin and Twitter. Subscribe to the mailing list by sending an email to (dev-subscribe@xtable.apache.org). Follow the project on Github or reachout directly to any of the Github contributors to learn more.</p>
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        <p style="text-align:left; font-weight: 300; font-size: 0.8em;">Apache XTable™ is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
        <p style="text-align:left; font-weight: 300; font-size: 0.8em;">Copyright ©2024 Apache XTable™, XTable, Apache, the Apache feather logo and the Apache XTable™ project logo are either registered trademarks or trademarks of The Apache Software Foundation in the United States and other countries.</p>
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